改進Prony算法在輸電線路單端故障測距中的應(yīng)用
楊茂亭1,陳平1,楊致泰2, 曹運剛1
(1 山東理工大學(xué) 電氣與電子工程學(xué)院,山東 淄博 255091;
2 煙臺寶鋼鋼管有限責(zé)任公司PQF管加工分廠,山東 煙臺 265500)
摘 要: 短路故障輸電線路中衰減的非周期分量和高頻分量會影響故障測距的精度,針對這種情況,提出了使用改進Prony 算法,從故障后的電壓與電流信號中提取其工頻分量,并將其應(yīng)用到單端故障測距中,從而提高了測距的精度。通過建立PSCAD 仿真模型,將計算結(jié)果與傅里葉算法所得結(jié)果進行比較,證明了改進Prony 算法可以有效提高測距的精度。
關(guān)鍵詞: 改進Prony 算法;故障測距;輸電線路;故障分析
中圖分類號:TM855 文獻標識碼:A 文章編號:1007-3175(2014)05-0034-05
Application of Improved Prony Algorithm in Single-Ended Fault Location of Transmission Lines
YANG Mao-ting1, CHEN Ping1, YANG Zhi-tai2, CAO Yun-gang1
(1 School of Electrical and Electronic Engineering, Shandong University of Technology, Zibo 255091 , China;
2 PQF Pipe Processing Sub-factory, Yantai Baosteel Pipe Limited Company, Yantai 265500, China)
Abstract: Aiming at the situation that in the fault power transmission lines the decaying aperiodic component and high-frequency component will cause inaccuracy in fault localization, this paper proposed the improved Prony algorithm that extracted the power frequency component from signals of fault voltages and fault currents, which was applied in the single-ended fault location to improve the accuracy of fault location. By establishment of the PSCAD simulation model the ultimate calculation result was compared with that of Fourier algorithm, which proves the improved algorithm can effectively improve the accuracy of fault location.
Key words: improved Prony algorithm; fault location; transmission line; fault analysis
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